<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">  
   </head>
  <body>
    <form action="/test_cgi" method="POST">
      x:<input type="text" name="data_x" value="0">
      <br>
      y:<input type="test" name="data_y" value = "1">
    </form>
      <p> 请注意表单本身是不可见的 </p>
      <p> 点击提交后数据被发送给test_cgi处理</p>
  </body>
</html>
